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Cheap flights from St. Louis to Sofia from $756

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:37 am - 12:10 pm
STL
-
SOF
16h 33m
2 stops
United Airlines Logo
6:10 am - 8:25 pm
SOF
-
STL
22h 15m
2 stops
$756United Airlines
Wed, Apr 29 - Tue, May 5
United Airlines Logo
11:37 am - 12:10 pm
STL
-
SOF
16h 33m
2 stops
United Airlines Logo
2:10 pm - 1:25 pm
SOF
-
STL
31h 15m
1 stop
$773United Airlines
Wed, Apr 29 - Tue, May 5
United Airlines Logo
11:37 am - 12:10 pm
STL
-
SOF
16h 33m
2 stops
United Airlines Logo
2:20 pm - 4:39 pm
SOF
-
STL
34h 19m
2 stops
$783United Airlines
Wed, Apr 29 - Mon, May 4
United Airlines Logo
1:36 pm - 6:40 pm
STL
-
SOF
21h 04m
2 stops
United Airlines Logo
6:10 am - 1:25 pm
SOF
-
STL
15h 15m
1 stop
$787United Airlines
Tue, Sep 1 - Tue, Sep 15
Air Canada Logo
12:10 pm - 6:40 pm
STL
-
SOF
22h 30m
2 stops
Air Canada Logo
6:10 am - 6:41 pm
SOF
-
STL
20h 31m
2 stops
$789Air Canada
Tue, Sep 1 - Tue, Sep 15
United Airlines Logo
5:32 pm - 11:00 pm
STL
-
SOF
21h 28m
2 stops
United Airlines Logo
6:30 am - 6:41 pm
SOF
-
STL
20h 11m
2 stops
$790United Airlines
Wed, Sep 2 - Thu, Sep 10
Lufthansa Logo
3:30 pm - 6:00 pm
STL
-
SOF
18h 30m
1 stop
Lufthansa Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$793Lufthansa
Tue, Sep 1 - Fri, Sep 11
United Airlines Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
United Airlines Logo
6:10 am - 1:25 pm
SOF
-
STL
15h 15m
1 stop
$794United Airlines
Wed, Sep 2 - Tue, Sep 15
United Airlines Logo
3:30 pm - 1:05 pm
STL
-
SOF
13h 35m
1 stop
United Airlines Logo
6:30 am - 6:41 pm
SOF
-
STL
20h 11m
2 stops
$798United Airlines
Tue, Sep 1 - Thu, Sep 10
United Airlines Logo
11:37 am - 12:10 pm
STL
-
SOF
16h 33m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$803United Airlines
Wed, Apr 29 - Sun, May 3

Turkish Airlines flights from St. Louis to Sofia

Our best Turkish Airlines deals on St. Louis to Sofia flight tickets
Turkish Airlines
Apr 3
STL7:45 amLambert-St Louis
28h 30m
2 stops
SOF8:15 pmSofia
Jun 17
SOF9:05 pmSofia
32h 11m
2 stops
STL9:16 pmLambert-St Louis
$894
Turkish Airlines
May 1
STL7:45 amLambert-St Louis
17h 00m
2 stops
SOF8:45 amSofia
May 15
SOF9:05 pmSofia
32h 08m
2 stops
STL9:13 pmLambert-St Louis
$967

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets
Lufthansa
Sep 1
STL3:30 pmLambert-St Louis
18h 30m
1 stop
SOF6:00 pmSofia
Sep 11
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$793
Lufthansa
Sep 1
STL3:30 pmLambert-St Louis
13h 35m
1 stop
SOF1:05 pmSofia
Sep 10
SOF2:10 pmSofia
31h 15m
1 stop
STL1:25 pmLambert-St Louis
$819
Lufthansa
Sep 1
STL3:30 pmLambert-St Louis
13h 35m
1 stop
SOF1:05 pmSofia
Sep 12
SOF1:55 pmSofia
17h 05m
2 stops
STL11:00 pmLambert-St Louis
$864

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 27, 2026.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/29

11:37 am-12:10 pm

2 stops16h 33m

Sofia

Tue 5/5

6:10 am-8:25 pm

2 stops22h 15m

$756

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/29

11:37 am-12:10 pm

2 stops16h 33m

Sofia

Tue 5/5

2:10 pm-1:25 pm

1 stop31h 15m

$773

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/29

11:37 am-12:10 pm

2 stops16h 33m

Sofia

Mon 5/4

2:20 pm-4:39 pm

2 stops34h 19m

$783

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 9/1

1:36 pm-6:40 pm

2 stops21h 04m

Sofia

Tue 9/15

6:10 am-1:25 pm

1 stop15h 15m

$787

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 9/1

12:10 pm-6:40 pm

2 stops22h 30m

Sofia

Tue 9/15

6:10 am-6:41 pm

2 stops20h 31m

$789

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/2

5:32 pm-11:00 pm

2 stops21h 28m

Sofia

Thu 9/10

6:30 am-6:41 pm

2 stops20h 11m

$790

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 9/1

3:30 pm-6:00 pm

1 stop18h 30m

Sofia

Fri 9/11

6:20 am-1:25 pm

1 stop15h 05m

$793
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 9/2

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

Tue 9/15

6:10 am-1:25 pm

1 stop15h 15m

$794

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 9/1

3:30 pm-1:05 pm

1 stop13h 35m

Sofia

Thu 9/10

6:30 am-6:41 pm

2 stops20h 11m

$798

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/29

11:37 am-12:10 pm

2 stops16h 33m

Sofia

Sun 5/3

6:20 am-1:25 pm

1 stop15h 05m

$803

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Sofia from

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Sofia?

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $849 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $730 on momondo.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 37% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time

20h 47m

Direct flights

None
The fastest flight from St. Louis to Sofia takes 20h 47m
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 20h 47m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,491 reviews
Search United Airlines flights
LufthansaPriceFrom $598Free CancellationRating
6.8
7,871 reviews
Search Lufthansa flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

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Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

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Lufthansa
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